Felix gut



(No Model.)

F. GUT.

DRILLING MACHINE.

No. 328,886. Y Patented Oct. 20, 1885.

s Ui i e l iw N. PETERS, Phuuruuwgmpher. wasningmn. D4 c,

UNITED STATES PATENT OFFICE.

FELIX GUT, or norfriNeEN, NEAR zinnen, swIrzERLANn DRILLING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 328,886, dated Octoberr20,18815.

Application filed August 22', 1885.

To all whom it may concern:

Be it known that LFELIX GUT, of Hottingen, near Zurich, Switzerland,have invented a new and useful Improvement in Boring- Drills, of whichthe following is a specication.

This invention relates to an improved boring-drill for enlarging theinner ends of the rivet or bolt holes of boilers, tanks, Ste., from theoutside, so as to dispense .with the inconvenience connected withenlarging the holes in the coniined space at the inside of the boiler ortank; and the invention consists of certain details of construction andcombination of parts,which will be described hereinafter, and finallypointed out in the claims.

In the accompanying drawings, Figure 1 represents a side elevation of myimproved boring-drill. Fig. 2 is a vertical central section of the same;and Figs. 3, 4, and 5 are details of parts of the same.

Similar letters of reference indicate corresponding parts.

In the drawings, c represents the spindle of a boring-drill, which isscrewed or otherwise secured into a socket-piece, p. To the end of thespindle ct is splined a conical boring or drilling tool, b, which is setagainst ashoulder Vof the spindle, and secured by means of a spring-key,d, that is passed through a transverse hole, e, at the end of thespindle c. The socket-piece p is provided with alongitudinal groove, p',for the spline q of a ratchet-wheel, q,which is engagedbyaspring-actuated pawl, 1, that is located in a socket-shaped recess ofan oscillating lever, f. The socket-piece p is connected withascrew-nut, m, by a couplingpiece, o, which latter is keyed to thesocketpiece and seated 4by its. enlarged head in the lower contractedpart of the nut m. The nut m is guided by longitudinal grooves m on xedguide-pins nu of the tubular casing A, within which the socket-piece pand its nut m are located.

A screw-bolt, Z, passes through the casing A down into the nut m, and isprovided with levers g g, that are retained on the outer end of thescrew-boltZ by a nut and washer, Z.

To the upper end of the casing Ais attached a guide-disk, h, by means ofscrews h,said disk being recessed for guiding the shoulder Z2 of thescrew Z.

Below the disk h is arranged a guide-disk,

Serial No. 175,050. (No model.)

7c, which bears against the shoulder Z2, and which retains, togetherwith the disk h, the screw Z in position in the casing A.

Between the disk hand the levers g g are interposed two spring disks orplateszi, which plates exert a tension on the levers, so as to causethev turning of the screw Zwith the levers g.

By turning the levers g the screwZ is turned, and the nut m moved up,whereby the spindle c and drilling-tool b are drawn into the rivet orbolt-hole, so as to be ready to operate on the inner end of the hole tobe drilled out.

The casing A and nut m are provided atopposite sides with elongatedopenings,by means of which the socket-piece p can be held in position ina vise when it is desired to remove the spindle a from the socket-piecep. These openings also serve for inserting and removing theconnecting-piece o.

The boring-drill is worked as follows: The spindle a is inserted fromthe outside into the rivet or bolt hole of the boiler, tank, or otherplate and the drilling-tool b applied to the spindle by the spring-keyd. The boring-tool b is then drawn up against the inner edge of the holeto be enlarged by turning the levers g g, which turn the screw Z,andmove the nut m and socket-piecep into the hole of the plate, while thecasing A rests by its base on the outside of the same. The lever f isnext oscillated and the hole drilled out by the tool b. The levers g gare turned from time to time,so

that the boring-tool is fed forward into the hole until the same isenlarged to its full eX- tent, as required for the head of the rivet orbolt. The boring-tool is then removed from the spindle, and the latter`inserted into the next hole, after which the boring-tool is securedagain to the spindle, and the hole enlarged, as described. Y

Having thus described my invention, ll claim as new and desire to secureby Letters Patent- 1. The combination of thetubular casing A,guide-disks h and k, screw Z, having shoulder Z2 and levers gg,springdisks @interior screwnut, m, socket-piecep, coupling-pieceo,ratchet q, oscillating lever f, having a spring-actuated pawl, r, andspindle c, having a detachable boring-tool, b, substantially as setforth.

2. The combination of a tubular casing, A, having guide-screws n n,guide-disks h and le,

IOO

and oscillating lever f, having a spring-aetuated pawl, 1",substantially as set forth'.

4. In a boring-drill, the combination of a` spindle having a shoulder, adetaehablebor- 1 5 ing-tool splined to the spindle, and a springkeyinserted into' a transverse reeesis'atthe end of the spindle,substantially as set forth.

5. In a boring-drill, the combination of the tubular easing A,socket-piece p, ratchet g, osoillatingleverf, and aspring-aetuated pawl,zo

4, located in -a socket-holeof said lever, sub- 'stantialiy as set'forth. 1

In testimony whereof I have signed this spee'ieation'in the presence oftwo subscribing'witnesses.

FELIX GUT.

Vitnesses:

T. RAUB, PH. G. MARTZ.

